含偶氮基聚合物中实时全息光栅和光致双折射效应的实验研究

Experimental Study on a New Azopolymer Film in Real Time Holograph and Photo-Induced Birefringerce Effect

研究了一种新的含偶氮基的三元共聚物，在６３３ｎｍ处测得光感生双折射δｎ值达１０－３量级，写入的全息光栅的实时单光束衍射效率在１０％以上．其物理机制为在偏振光作用下，由于在聚合物中引入了柔性链段，偶氮功能易于通过顺反异构而重新取向，从而产生强的光致双折射效应．

A new azopolymer material has been studied. Real time holograms were recorded at 633nm, High diffraction efficiency above 10% was obtained, and large photo-induced irefringence δ n >10 -3 was measured.